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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 QM DSP Library
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5
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2005-2006 Christian Landone.
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8 All rights reserved.
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9 */
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10
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11 #ifndef CONSTANTQ_H
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12 #define CONSTANTQ_H
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13
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14 #include <vector>
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15 #include "maths/MathAliases.h"
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16 #include "maths/MathUtilities.h"
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17
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18 struct CQConfig{
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19 unsigned int FS; // samplerate
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20 double min; // minimum frequency
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21 double max; // maximum frequency
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22 unsigned int BPO; // bins per octave
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23 double CQThresh; // threshold
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24 };
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25
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26 class ConstantQ {
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27
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28 //public functions incl. sparsekernel so can keep out of loop in main
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29 public:
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30 void process( const double* FFTRe, const double* FFTIm,
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31 double* CQRe, double* CQIm );
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32
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33 ConstantQ( CQConfig Config );
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34 ~ConstantQ();
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35
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36 double* process( const double* FFTData );
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37
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38 void sparsekernel();
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39
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40 double hamming(int len, int n) {
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41 double out = 0.54 - 0.46*cos(2*PI*n/len);
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42 return(out);
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43 }
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44
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45 int getnumwin() { return m_numWin;}
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46 double getQ() { return m_dQ;}
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47 int getK() {return m_uK ;}
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48 int getfftlength() { return m_FFTLength;}
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49 int gethop() { return m_hop;}
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50
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51 private:
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52 void initialise( CQConfig Config );
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53 void deInitialise();
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54
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55 double* m_CQdata;
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56 unsigned int m_FS;
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57 double m_FMin;
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58 double m_FMax;
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59 double m_dQ;
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60 double m_CQThresh;
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61 unsigned int m_numWin;
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62 unsigned int m_hop;
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63 unsigned int m_BPO;
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64 unsigned int m_FFTLength;
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65 unsigned int m_uK;
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66 std::vector<unsigned> m_sparseKernelIs;
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67 std::vector<unsigned> m_sparseKernelJs;
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68 std::vector<double> m_sparseKernelImagValues;
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69 std::vector<double> m_sparseKernelRealValues;
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70 };
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71
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72
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73 #endif//CONSTANTQ_H
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74
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